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Efficacy of a Novel Adjustable Snare Technique Versus the Conventional Technique for Converting the Orobiliary Catheter to a Nasobiliary Catheter.
J Gastroenterol Hepatol
December 2024
Department of Gastroenterology, Zhongnan Hospital of Wuhan University, Wuhan, China.
Background And Object: It is a challenging step to guide a nasobiliary catheter from the mouth to the nasal cavity in endoscopic nasobiliary drainage (ENBD), and new methods are always being explored to improve the procedure. We have developed a novel device which is composed of a dedicated adjustable snare and a tongue depressor-like handle, for completing oral-nasal conversion of the ENBD tube. In this study, we aim to assess the utility of our new technique in repositioning the ENBD catheter by comparing it with conventional guidewire technique.
View Article and Find Full Text PDFA new mesoporous Ce-Mn-LDH-based Co-MOF nano-composite for the green synthesis of tetrazoloquinazolines.
Nanoscale Adv
November 2024
Department of Organic Chemistry, Faculty of Chemistry and Petroleum Sciences, Bu-Ali Sina University Hamedan Iran +98-81-31408025 +98-81-38380922.
Tannic acid (TA), as a plant polyphenol, has many active sites for chelation with metals, so TA-oligomers (TA-Olig) were used for the first time as ligands on the surface of Ce-Mn-LDH to prepare the layered double hydroxide-based metal-organic framework (Ce-Mn-LDH@CPTMS@TA-Olig@Co-MOF = E) nanocomposite. In this regard, a homogeneous water/ethanol solution was prepared by sol-gel method using polyethylene glycol and ammonia solution, and then TA was converted into a set of oligomers in the presence of formaldehyde. In the next step, Ce-Mn-LDH was prepared in a ratio of 1 : 4 of Ce to Mn, modified with 3-chloropropylmethoxysilane, functionalized by TA-Olig, and then cobalt salt was used to prepare E.
View Article and Find Full Text PDFEnhanced transient oscillations-free response for a dual-active-bridge series-resonant DC-DC converter with dynamic trajectory prediction modulation.
Heliyon
December 2024
Department of Computing and Artificial Intelligence, Suzhou City University, No. 1188 Wuzhong Avenue, Wuzhong District, Suzhou, 215104, Jiangsu, China.
The dual-active-bridge series-resonant converter, offering galvanic isolation and high power density, is a viable and attractive solution for the isolated DC/DC power stage in Solid-State Transformers. Under the step load commands, the resonant tanks typically experience severe oscillations, which delay the transient response and the entry into the final steady state. To address these drawbacks, this paper proposes a dynamic trajectory prediction modulation (DTPM) method for adjusting the transient process.
View Article and Find Full Text PDFBorane-Mediated Highly Secondary Selective Deoxyfluorination of Alcohols.
Angew Chem Int Ed Engl
December 2024
University of Edinburgh, Chemistry, South Bridge, EH8 9YL, Edinburgh, UNITED KINGDOM OF GREAT BRITAIN AND NORTHERN IRELAND.
Organofluorine compounds are vital across multiple sectors, hence highly selective methods to install fluorine are of considerable importance. The deoxyfluorination of alcohols is a key approach to prepare organofluorine compounds, however, a highly secondary (2°)-selective deoxyfluorination of alcohols has not been realized to date. Herein, we report that borane-mediated deoxyfluorination results in high 2°-selectivity in inter- and intra-molecular competition reactions versus primary (1°), tertiary (3°) and even benzylic (Bn) alcohols.
View Article and Find Full Text PDFFrom an Enteroatmospheric to an Enterocutaneous Fistula Using a Condom.
Cureus
November 2024
General Surgery, Centro Hospitalar Barreiro Montijo, Barreiro, PRT.
An enteroatmospheric fistula (EAF) is one of the most feared complications of damage control laparotomy. Its management is highly challenging, often requiring multiple surgeries and prolonged hospitalization. It is a serious condition, and despite significant improvements in mortality rates due to advancements in intensive care, the rate remains substantial.
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